Power supply system and power supplying control method

Abstract

A power supply system adopting two power supplies connected in parallel includes a first power supply comprising a first voltage-output terminal; a second power supply comprising a second voltage-output terminal; a first switch circuit comprising an input terminal connected to the first voltage-output terminal; a second switch circuit comprising an input terminal connected to the second voltage-output terminal; and a plug comprising a first pin connected to both an output terminal of the first switch circuit and an output terminal of the second switch circuit; wherein the voltage outputted from the first voltage-output terminal is equal to the voltage outputted from the second voltage-output terminal.

1 . A power supply system adopting two power supplies connected in parallel, comprising:
 a first power supply comprising a first voltage-output terminal;   a second power supply comprising a second voltage-output terminal;   a first switch circuit comprising an input terminal connected to the first voltage-output terminal;   a second switch circuit comprising an input terminal connected to the second voltage-output terminal; and   a plug comprising a first pin connected to both an output terminal of the first switch circuit and an output terminal of the second switch circuit;   wherein the voltage outputted from the first voltage-output terminal is equal to the voltage outputted from the second voltage-output terminal.   
   
   
       2 . The power supply system adopting two power supplies connected in parallel according to  claim 1  wherein the plug further comprises a second pin, and an active signal outputted from a motherboard is transmitted to the first power supply and the second power supply via the second pin. 
   
   
       3 . The power supply system adopting two power supplies connected in parallel according to  claim 1  further comprising a logic gate having a first input terminal connected to the first power supply, a second input terminal connected to the second power supply, and an output terminal connected to a third pin of the plug. 
   
   
       4 . The power supply system adopting two power supplies connected in parallel according to  claim 1  wherein the voltage outputted from the first voltage-output terminal is +3V, +5V, +5VSB, or +12V. 
   
   
       5 . The power supply system adopting two power supplies connected in parallel according to  claim 1  wherein the plug is a 24-pin plug, a 4-pin plug, a VGA plug, or a HD plug. 
   
   
       6 . The power supply system adopting two power supplies connected in parallel according to  claim 1  wherein the first switch circuit and the second switch circuit are arranged on a power translating board. 
   
   
       7 . The power supply system adopting two power supplies connected in parallel according to  claim 1  wherein the first switch circuit further comprises:
 a switch comprising an input terminal being the input terminal of the first switch circuit, an output terminal being the output terminal of the first switch circuit, and a control terminal; and   a detect circuit comprising a first detect terminal connected to the input terminal of the first switch circuit and a second detect terminal connected to the output terminal of the first switch circuit, wherein a control signal is outputted from the detect circuit to the control terminal of the switch;   wherein the switch is connected if the voltage at the first detect terminal is greater than the voltage at the second detect terminal; or the switch is disconnected if the voltage at the first detect terminal is not greater than the voltage at the second detect terminal.   
   
   
       8 . The power supply system adopting two power supplies connected in parallel according to  claim 7  wherein the voltage of the control signal is greater than the voltage at the first voltage-output terminal. 
   
   
       9 . A computer with a power supply system adopting two power supplies connected in parallel, comprising:
 a first power supply comprising a first voltage-output terminal;   a second power supply comprising a second voltage-output terminal;   a first switch circuit comprising an input terminal connected to the first voltage-output terminal;   a second switch circuit comprising an input terminal connected to the second voltage-output terminal;   a plug comprising a first pin connected to both an output terminal of the first switch circuit and an output terminal of the second switch circuit; and   a motherboard comprising a jack disposed therein a first pin connected to the first pin of the plug;   wherein the voltage outputted from the first voltage-output terminal is equal to the voltage outputted from the second voltage-output terminal.   
   
   
       10 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 9  wherein the plug further comprises a second pin connected to a second pin of the jack, and an active signal outputted from the motherboard is transmitted to the first power supply and the second power supply via the second pin. 
   
   
       11 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 9  further comprising a logic gate having a first input terminal connected to the first power supply, a second input terminal connected to the second power supply, and an output terminal, connected to a third pin of the plug. 
   
   
       12 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 9  wherein the voltage outputted from the first voltage-output terminal is +3V, +5V, +5VSB, or +12V. 
   
   
       13 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 9  wherein the plug is a 24-pin plug, a 4-pin plug, a VGA plug, or a HD plug. 
   
   
       14 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 9  wherein the first switch circuit and the second switch circuit are arranged on a power translating board. 
   
   
       15 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 9  wherein the first switch circuit further comprises:
 a switch comprising an input terminal being the input terminal of the first switch circuit, an output terminal being the output terminal of the first switch circuit, and a control terminal; and   a detect circuit comprising a first detect terminal connected to the input terminal of the first switch circuit and a second detect terminal connected to the output terminal of the first switch circuit, wherein a control signal is outputted from the detect circuit to the control terminal of the switch;   wherein the switch is connected if the voltage at the first detect terminal is greater than the voltage at the second detect terminal; or the switch is disconnected if the voltage at the first detect terminal is not greater than the voltage at the second detect terminal.   
   
   
       16 . The computer with a power supply system adopting two power supplies connected in parallel according to  claim 15  wherein the voltage of the control signal is greater than the voltage at the first voltage-output terminal. 
   
   
       17 . A power supplying control method of a computer system for use with a first power supply and a second power supply both providing a first voltage to a motherboard, comprising steps of:
 detecting whether the first power supply starts to build the first voltage;   outputting the first voltage, built by the first power supply, to a first pin when the first power supply starts to build the first voltage;   detecting whether the second power supply starts to build the first voltage;   outputting the first voltage, built by the second power supply, to the first pin when the second power supply starts to build the first voltage; and   outputting the first voltage power to the motherboard via the first pin.   
   
   
       18 . The method according to  claim 17  wherein the first power supply and the second power supply start to the build the first voltage after receiving an active signal from the motherboard. 
   
   
       19 . The method according to  claim 17  further comprising a step of outputting a power good signal to the motherboard after either the first power supply or the second power supply is at a stable state.